Chemical Engineering Basics MCQs

Question 1

Which one can be directly solidified from gaseous state wihtout entering into liquid state?

Accepted Answer

Carbon dioxide

Answer

Helium

Answer

Oxygen

Answer

None of these

Question 2

Failure of a material is attributed to __________ if it fails below its yield point.

Accepted Answer

Fatigue

Answer

Impact loading

Answer

Creep

Answer

Straining

Question 3

Increasing sulphur content in pig iron tends to make it

Accepted Answer

Hard

Answer

Soft

Answer

Tough

Answer

Ductile & malleable

Question 4

Springback in sheet metal bending depends on the

Accepted Answer

Thickness of sheet

Answer

Elastic limit

Answer

Bend radius

Answer

Degree of bend

Question 5

Number of electrons in the outermost orbit of a semi-conductor is

Accepted Answer

4

Answer

2

Answer

6

Answer

8

Question 6

Pick out the wrong statement about powder metallurgy technique.

Accepted Answer

Powder metallurgy techniques are applied at room temperature

Answer

Final product in powder metallurgy is not necessarily metallic powder

Answer

The final product in powder metallurgy is made from metallic powder

Answer

Silver and nickel when melted together do not mix to form an alloy ; however alloy of these constituents can be made by powder metallurgy technique

Question 7

Which of the following is not used as a bearing material?

Accepted Answer

Cermets

Answer

Copper-lead alloys

Answer

Babbits

Answer

Bronzes

Question 8

Which of the following metals can not be hot worked at room temperature?

Accepted Answer

Nickel

Answer

Zinc

Answer

Lead

Answer

Tin

Question 9

Improvement in mechanical properties of metals in its hot working is due to the grains

Accepted Answer

Refinement

Answer

Recrystallisation

Answer

Growth

Answer

Recovery